<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>04_JS运算符</title>
    </head>
    <body>
        <script>
            console.log(6/2);//2
            console.log(3/2);//1.5

            console.log(3>10);//false
            console.log(3>'10');//false Number('10')=> 3>10?
            console.log('3'>10);//false
            console.log('奇'>'宇');//都是字符串比较的是字符的编码值
            console.log('奇'.charCodeAt());//查看字符的编码值,默认值为0,查看第一个字符的编码值
            console.log('宇'.charCodeAt());
            console.log('3'>'10');//51>49=true
            console.log('3'.charCodeAt());//51
            console.log('13'.charCodeAt(0));//第一个位置,1的编码为49
            console.log('13'.charCodeAt(1));//第一个位置,3的编码为51

            let a = 1;
            let b = true;
            //松散比较运算符会比较左右两边的值,严格比较运算符会先比较类型,类型相同再比较值
            console.log(a == b);//1==Number(true) 值都是1 结果为true
            console.log(a === b);//number ≠ boolean =>false

            //三元运算符
            //1 ? 2 : 3
            let c = 0;
            console.log(c == 0 ? 'YES' : 'NO');//'YES'
            console.log(c = 0 ? 'YES' : 'NO');//'NO'

        </script>
    </body>
</html>